31240315153013 has 4 divisors (see below), whose sum is σ = 31241310320748. Its totient is φ = 31239319985280.

The previous prime is 31240315152997. The next prime is 31240315153039. The reversal of 31240315153013 is 31035151304213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24808298908849 + 6432016244164 = 4980793^2 + 2536142^2 .

It is a cyclic number.

It is not a de Polignac number, because 31240315153013 - 2⁴ = 31240315152997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240315153813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497536778 + ... + 497599563.

It is an arithmetic number, because the mean of its divisors is an integer number (7810327580187).

Almost surely, 2^{31240315153013} is an apocalyptic number.

It is an amenable number.

31240315153013 is a deficient number, since it is larger than the sum of its proper divisors (995167735).

31240315153013 is an equidigital number, since it uses as much as digits as its factorization.

31240315153013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995167734.

The product of its (nonzero) digits is 16200, while the sum is 32.

Adding to 31240315153013 its reverse (31035151304213), we get a palindrome (62275466457226).

The spelling of 31240315153013 in words is "thirty-one trillion, two hundred forty billion, three hundred fifteen million, one hundred fifty-three thousand, thirteen".